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Using Flash Media Server
Edge Servers

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Содержание FIREWORKS 2-USING FIREWORKS

Страница 1: ...Using Flash Media Server Edge Servers ...

Страница 2: ...n of the link does not imply that Macromedia endorses or accepts any responsibility for the content on those third party sites Jabber is a registered trademark of the Jabber Software Foundation Sorenson Spark video compression and decompression technology licensed from Sorenson Media Inc Copyright 2002 2005 Macromedia Inc All rights reserved This manual may not be copied photocopied reproduced tra...

Страница 3: ...onnecting to an edge server 12 Detecting the presence of proxy servers 13 Chaining edge servers 13 Configuring edge servers 14 Deploying a cluster of edge servers 15 Connecting to a cluster of edge servers 16 Enrolling proxy servers in the cluster 16 Accessing applications through an edge cluster 16 Clustering reverse proxies 17 Setting up origin and proxy servers 18 Maintaining edge server cluste...

Страница 4: ...4 Contents ...

Страница 5: ...in your organization offers significant benefits Enhanced security is one benefit Applications running on the origin server are no longer directly exposed to the Internet All requests for Flash Media Server services are routed through known and secure connection points These connectors are called edge or proxy servers the terms are interchangeable Administrators can monitor the traffic on edge ser...

Страница 6: ... to the edge server which in turn forwards the data to the client the user s computer It may seem to the users that they are directly connected to the origin server where the application is located The edge server does make it appear as if it is running the application The edge server s role however is to mediate the communications between clients and the origin server Edge servers authenticate th...

Страница 7: ...onnection to the origin server All communications between edge and origin servers happen transparently to the users To distribute the demands on network and system resources administrators can assign the users in a geographical region or functional area of the organization to a specific edge server For example one edge server might aggregate and forward requests from users in Tokyo and another mig...

Страница 8: ... resources efficiently Caching static content reduces the overall load placed on the origin server A networked Flash Media Server deployment involves multiple edge servers these can be deployed individually or in clusters Edge servers can also be chained where one edge server collects and aggregates the connection requests from other edge servers and their clients then transmits the requests to an...

Страница 9: ...he it returns the data to the requesting client the user s computer without ever calling upon the origin server This detour is transparent to the user The edge server is conserving bandwidth by not connecting to the origin server In this scenario no demands are placed on the origin server Deploying edge servers in the DMZ Edge servers may be deployed in the demilitarized zone DMZ of a corporate ne...

Страница 10: ...e explicit proxy specifies the edge servers that will intercept the clients connection requests to the origin server The identity the IP address and port number of the implicit proxy is hidden from the client The implicit proxy does not change or modify the routing information in the incoming URI before it connects the clients to the origin server Edge servers are also defined as implicit proxies ...

Страница 11: ...rs and position them closer to the origin server Reverse proxies are usually located within an organization s DMZ and control access to Flash Media Server resources from clients connecting through the Internet to an origin server located behind the firewall Reverse proxies redirect incoming connection requests instead of outgoing connection requests as in the case of explicit and anonymous proxies...

Страница 12: ...ner tag holds all the RouteEntry tags For example the RouteTable container may hold one RouteEntry tag to specify a secure outgoing connection by using RTMP and another RouteEntry tag that specifies the nonsecure RTMP connection If a protocol is not specified the outgoing connection uses the same protocol as the incoming connection For detailed information on these routing tags see Vhost xml file ...

Страница 13: ... you make connections to the origin server The following URI shows how two explicit proxies are chained together to direct connection requests to the origin server rtmp proxy1 rtmp proxy2 rtmp origin app inst When you use URL decoration to chain proxies Flash Player 7 and earlier versions may have problems with shared objects because of the embedded question mark character in the URL A workaround ...

Страница 14: ...s to the origin server These settings determine how the incoming URLs are routed between the edges and the origin server You can have a computer run Flash Media Server in a mixed mode in which certain virtual hosts on this system run applications locally while others run applications remotely To configure Flash Media Server you edit or modify the XML tags in its configuration files Following are s...

Страница 15: ...he results in a cache making it available to other servers and clients As this organization grows or reallocates its resources it can add more edge servers to the cluster or explicitly reassign clients to different edge servers Organization B uses a cluster of edge servers to manage the inbound traffic from clients located outside of the network This traffic is destined for Flash Media Server appl...

Страница 16: ...ges allowed in the cluster The edge that is starting up waits for all of the responses to be received then assigns itself the first ID not found in the sequence When an edge server shuts down it broadcasts a message announcing its exit from the cluster Accessing applications through an edge cluster To maximize the conservation of network and bandwidth resources Flash Media Server directs to the sa...

Страница 17: ...roadcast for a connection request cannot reach either an edge server or the origin server and the requested application The URI for the proxy cluster or the origin server is not found on the client Reverse proxying requires a different strategy for connecting clients and applications Clustering works efficiently when all clients that request the same application instance connect to the same edge s...

Страница 18: ... origin and proxy servers Using these guidelines helps ensure satisfactory performance and results Make sure your Macromedia license permits you to use proxy servers or a proxy cluster Deploy all proxy and origin servers on identical computers Use the same operating system Linux or Windows on all computers to avoid conflicts with filenames Linux uses case sensitive filenames filenames on Windows a...

Страница 19: ...next Flash Media Server in the cluster 5 Configure this Flash Media Server instance as an edge server 6 Make sure this edge server points to the origin server 7 Repeat steps 5 through 7 for each edge server that your license file allows Your Flash Media Servers are now clustered To expand the cluster s capacity you may add new edge servers if your license permits to the cluster and configure them ...

Страница 20: ...cache_directory 2 Run the cache bat file and verify that it deletes files in the cache directory Note that the directory structure remains this is an expected behavior Any files currently locked by the edge server are not deleted this is also an expected behavior 3 Select Control Panel Scheduled Tasks Add Scheduled Task 4 Select cache bat as the new file to run Macromedia recommends that you sched...

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